Arc-shaped piezoelectric ceramic positioning and chamfering device

Abstract

The utility model relates to a kind of arc piezoelectric ceramic positioning chamfering device, belong to piezoelectric ceramic electrode manufacturing technical field.The technical scheme is: the top of chamfer driven shaft is equipped with positioning sleeve, the top plane of chamfer driven shaft is provided with rubber pad (6), circular piezoelectric ceramic (7) is placed on rubber pad, circular piezoelectric ceramic is matched with upper driven optical axis, driven optical axis, positioning sleeve, circular piezoelectric ceramic and chamfer driven shaft are located on same axis;Polyurethane bearing placement block is close to chamfer driven shaft, and two polyurethane bearings are equipped on the top of polyurethane bearing placement block;One side of circular piezoelectric ceramic is positioned by semicircle positioning disc, and the other side is fixed by two polyurethane bearings.The utility model can position and fix circular piezoelectric ceramic of any thickness, chamfer conveniently;And realize circular piezoelectric ceramic quick change production, can be compatible with the chamfering of small batch circular piezoelectric ceramic, efficiency is higher, easy to operate, chamfer uniformity consistency is good.

Description

Technical Field

[0001] This utility model relates to an arc-shaped piezoelectric ceramic positioning chamfering device, belonging to the field of piezoelectric ceramic electrode manufacturing technology. Background Technology

[0002] Piezoelectric ceramics are a class of functional ceramic materials exhibiting the piezoelectric effect, widely used in electronic components such as sensors, ultrasonic transducers, piezoelectric actuators, and filters. In the preparation and processing of piezoelectric ceramics, chamfering is a crucial subsequent step, its implementation directly impacting the product's performance stability, reliability, and lifespan.

[0003] There are several existing methods for chamfering circular piezoelectric ceramics. Some involve hand-held sandpaper or oilstone grinding, chemical etching, or laser processing. Hand-held grinding results in poor uniformity and low efficiency. Chemical etching is difficult to control precisely, easily leading to over-etching of the ceramic surface, and the waste liquid requires environmentally friendly treatment. Laser processing equipment is expensive and has low processing efficiency. Some methods use chamfering machines with chamfering grinding blocks, such as the Chinese patent CN201821814259.X entitled "A chamfering tooling for piezoelectric ceramic discs." However, existing chamfering machines cannot process thin sheets, especially circular piezoelectric ceramics with a thickness of less than 5mm. Due to the thinness, it is difficult to position and fix them, making chamfering impossible. In addition, using chamfering machines is inconvenient for changing product types, inefficient, and requires the processing of matching tooling. Chamfering machines are suitable for mass production of conventional products, but for prototyping and small-batch processing of circular piezoelectric ceramics, chamfering methods are very inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide an arc-shaped piezoelectric ceramic positioning and chamfering device, which can position and fix circular piezoelectric ceramics of any thickness, facilitating chamfering; and enables rapid production changeover of circular piezoelectric ceramics, is compatible with chamfering of small batches of circular piezoelectric ceramics, has higher efficiency, is simple and flexible to operate, and has good uniformity of chamfering, thus solving the above-mentioned technical problems existing in the prior art.

[0005] The technical solution of this utility model is: A circular arc-shaped piezoelectric ceramic positioning and chamfering device includes a bench drill, a chamfering grinding block, and a positioning fixture. The positioning fixture is mounted on the bench drill's worktable and matches the drill's drive optical axis. The chamfering grinding block matches the outer edge of the circular piezoelectric ceramic for chamfering. The positioning fixture includes a base fixed to the worktable. A linear guide rail is mounted on the base, with a bearing placement block at one end and a screw fixing component at the other end. The bearing placement block is connected to a vertically arranged chamfering driven shaft via a horizontally arranged bearing. A positioning sleeve is located at the top of the chamfering driven shaft. The positioning sleeve consists of a bottom perforated cylinder and an upper semi-circular positioning plate. The perforated cylinder is fitted onto the top of the chamfering driven shaft through its through hole. A rubber pad is provided on the top surface of the chamfering driven shaft. A protrusion is provided on the circumference of the semi-circular positioning plate, and the distance from the center of the semi-circular positioning plate to the protrusion is equal to the radius of the circular piezoelectric ceramic. A circular piezoelectric ceramic is placed on the rubber pad. The circular piezoelectric ceramic is centered by protrusions on the circumference of a semi-circular positioning disc. The circular piezoelectric ceramic is matched with an upper active optical axis, and the active optical axis, positioning sleeve, circular piezoelectric ceramic, and chamfered driven shaft are all on the same axis. A slider is slidably mounted on a linear guide rail, and a slider connecting block is provided on the slider. A vertically arranged polyurethane bearing placement block is located at the front end of the slider connecting block, close to the chamfered driven shaft. Two polyurethane bearings are located at the top of the polyurethane bearing placement block. The semi-circular positioning disc of the positioning sleeve is located on the side away from the polyurethane bearings. The two polyurethane bearings are arranged tangentially to the circular piezoelectric ceramic on the rubber pad from opposite sides of the semi-circular positioning disc, fixing the positioned circular piezoelectric ceramic. One side of the circular piezoelectric ceramic is positioned by the semi-circular positioning disc, and the other side is fixed by the two polyurethane bearings. A screw is provided at the rear end of the slider connecting block, and the screw and screw fixing component cooperate to form a lead screw structure.

[0006] Before performing batch chamfering of circular piezoelectric ceramics, a single circular piezoelectric ceramic is placed on a rubber pad. A positioning sleeve is used to align the circular piezoelectric ceramic with the active optical axis and the chamfering driven shaft on the same axis. The distance between the polyurethane bearings and the circular piezoelectric ceramic at the top of the chamfering driven shaft is changed by adjusting the lead screw structure, ensuring that the two polyurethane bearings are tangent to the circular piezoelectric ceramics on the rubber pad, thus fixing their positions. After removing the circular piezoelectric ceramic and the positioning sleeve, another circular piezoelectric ceramic is placed on the rubber pad. The two polyurethane bearings, now in their fixed positions, are then... The ester bearing positions the newly placed circular piezoelectric ceramic, ensuring it is aligned with the drive shaft and the chamfering driven shaft. The bench drill is then started, causing the drive shaft to contact the circular piezoelectric ceramic and rotate it along with the chamfering driven shaft. The chamfering grinding block then chamfers the ceramic. After chamfering, the ceramic is removed, and another piece is placed for positioning and chamfering, and so on. Since this batch of circular piezoelectric ceramics is of the same size, they can all be positioned using two fixed polyurethane bearings, improving work efficiency. If processing another batch of circular piezoelectric ceramics with different diameters, simply replace the positioning sleeve with one of the corresponding specifications, readjust the positions of the two polyurethane bearings, and fix them in place. This completes the positioning of the new ceramic, and the above steps are repeated for chamfering.

[0007] The top of the chamfered driven shaft has an annular step, with a tapered chamfered driven shaft at the center of the annular step. A positioning sleeve is fitted onto the tapered chamfered driven shaft. A rubber pad is attached to the top upper surface of the tapered chamfered driven shaft, making it flush with the semi-circular positioning plate. Another rubber pad is also attached to the bottom of the active optical shaft. The rubber pads increase friction and prevent the circular piezoelectric ceramic from being bumped or knocked.

[0008] The chamfering grinding block is a known and commonly used material in the art, including oilstones and sandpaper. The chamfering grinding block can be mounted on a robotic arm, and the movement of the robotic arm can be automatically controlled to make the chamfering grinding block match the circular piezoelectric ceramic for chamfering; or the chamfering grinding block can be handheld for chamfering.

[0009] The bearing placement block is positioned by a circular locating pin and fixed to the base by bolts.

[0010] The linear guide rail is fixed on the base, and the slider and the limiting block are installed together on the linear guide rail. The limiting block is provided with a handle. Moving the handle and fixing the limiting block on the linear guide rail will position and fix the slider.

[0011] An adjustment knob is provided at the rear end of the screw. Rotating the adjustment knob causes the screw to rotate, thereby adjusting the position of the slider.

[0012] The outer diameter of the polyurethane bearing is smaller than the outer diameter of the circular piezoelectric ceramic.

[0013] The drill rig mentioned is a common industrial drill rig. The beneficial effects of this utility model are: it can position and fix circular piezoelectric ceramics of any thickness, making it convenient to chamfer; it can realize rapid production changeover of circular piezoelectric ceramics, and can be compatible with chamfering of small batches of circular piezoelectric ceramics, resulting in higher efficiency, simple and flexible operation, and good uniformity of chamfering. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a top view schematic diagram of an embodiment of the present utility model; Figure 3 This is a perspective view of an embodiment of the present utility model; Figure 4 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 5 This is a three-dimensional schematic diagram of the positioning sleeve according to an embodiment of the present utility model; Figure 6 This is a top view schematic diagram of the positioning sleeve according to an embodiment of the present utility model; Figure 7 This is a cross-sectional view of the positioning sleeve according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 9 This is a three-dimensional schematic diagram of the overall structure of an embodiment of the present utility model; In the diagram: 1. Base; 2. Circular locating pin; 3. Bearing placement block; 4. Bearing; 5. Chamfered driven shaft; 6. Rubber pad; 7. Circular piezoelectric ceramic; 8. Linear guide rail; 9. Slider; 10. Limiting block; 11. Slider connecting block; 12. Polyurethane bearing placement block; 13. Polyurethane bearing; 14. Screw fixing part; 15. Adjustment knob; 16. Active optical axis; 17. Feed rotary handle; 18. Drill chuck; 19. Worktable; 20. Base worktable; 21. Housing; 22. Motor; 23. Column; 24. Screw; 25. Positioning sleeve; 26. Perforated cylinder; 27. Semi-circular positioning plate; 28. Protrusion; 29. ​​Annular step. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] A circular arc-shaped piezoelectric ceramic positioning and chamfering device includes a bench drill, a chamfering grinding block, and a positioning fixture. The positioning fixture is mounted on the worktable 19 of the bench drill and matches the active optical axis 16 of the bench drill. The chamfering grinding block matches the outer edge of the circular piezoelectric ceramic 7 to perform chamfering. The positioning fixture includes a base 1, which is fixed on the worktable 19. A linear guide rail 8 is provided on the base 1. One end of the linear guide rail 8 is provided with a bearing placement block 3, and the other end of the linear guide rail 8 is provided with a screw fixing member 14. The bearing placement block 3 is connected to the worktable 19 by means of a bearing placement block 14. A horizontally arranged bearing 4 is connected to a vertically arranged chamfered driven shaft 5. A positioning sleeve 25 is provided at the top of the chamfered driven shaft 5. The positioning sleeve 25 consists of a bottom-perforated cylinder 26 and an upper semi-circular positioning disk 27. The perforated cylinder 26 is fitted onto the top of the chamfered driven shaft 5 through its through hole. A rubber pad 6 is provided on the top surface of the chamfered driven shaft 5. A protrusion 28 is provided on the circumference of the semi-circular positioning disk 27. The distance from the center of the semi-circular positioning disk 27 to the protrusion 28 is equal to the radius of the circular piezoelectric ceramic 7. The circular piezoelectric ceramic 7 is placed on the rubber pad 6. The protrusions on the circumference of the semi-circular positioning disk 27 center the circular piezoelectric ceramic 7; the circular piezoelectric ceramic 7 matches the upper active optical axis 16, and the active optical axis 16, positioning sleeve 25, circular piezoelectric ceramic 7, and chamfered driven shaft 5 are located on the same axis; a slider 9 is slidably mounted on the linear guide rail 8, and a slider connecting block 11 is provided on the slider 9. A vertically arranged polyurethane bearing placement block 12 is provided at the front end of the slider connecting block 11. The polyurethane bearing placement block 12 is close to the chamfered driven shaft 5, and two... Polyurethane bearing 13; the semi-circular positioning plate 27 of the positioning sleeve 25 is located on the side away from the polyurethane bearing 13, and the two polyurethane bearings 13 are arranged tangentially to the circular piezoelectric ceramic 7 on the rubber pad 6 from the opposite side of the semi-circular positioning plate 27 to fix the positioned circular piezoelectric ceramic 7. One side of the circular piezoelectric ceramic 7 is positioned by the semi-circular positioning plate 27, and the other side is fixed by the two polyurethane bearings 13; the rear end of the slider connecting block 11 is provided with a screw 24, and the screw 24 and the screw fixing part 14 cooperate to form a lead screw structure.

[0017] Before chamfering a batch of circular piezoelectric ceramics 7, a single circular piezoelectric ceramic 7 is placed on a rubber pad 6. The positioning sleeve 25 is used to align the circular piezoelectric ceramic 7 with the active optical axis 16 and the chamfering driven shaft 5 on the same axis. The distance between the polyurethane bearing 13 and the circular piezoelectric ceramic 7 at the top of the chamfering driven shaft 5 is changed by adjusting the lead screw structure, so that the two polyurethane bearings 13 are tangent to the circular piezoelectric ceramics 7 on the rubber pad 6, thus fixing the position of the two polyurethane bearings 13. After removing the circular piezoelectric ceramic 7 and the positioning sleeve 25, another single circular piezoelectric ceramic 7 is placed on the rubber pad 6. The two bearings, now in their fixed positions... A polyurethane bearing 13 positions the newly placed circular piezoelectric ceramic 7, ensuring that the new circular piezoelectric ceramic 7, the active optical axis 16, and the chamfering driven shaft 5 are on the same axis. The bench drill is started, causing the active optical axis 16 to contact the circular piezoelectric ceramic 7, rotating the circular piezoelectric ceramic 7 and the chamfering driven shaft 5 together. The circular piezoelectric ceramic 7 is then chamfered using a chamfering grinding block. After chamfering, the circular piezoelectric ceramic 7 is removed, and another circular piezoelectric ceramic 7 is placed for positioning and chamfering, and so on. Since the circular piezoelectric ceramics 7 in this batch are of the same specification, they can all be positioned using two fixed polyurethane bearings 13, improving work efficiency. If processing another batch of circular piezoelectric ceramics 7 with different diameters, simply replace the corresponding positioning sleeve to position the new circular piezoelectric ceramic 7, readjust the positions of the two polyurethane bearings 13, and fix them to complete the positioning of the new specification circular piezoelectric ceramic 7. Then repeat the above steps to chamfer the circular piezoelectric ceramic 7.

[0018] The top of the chamfered driven shaft 5 is provided with an annular step 29, and the center of the annular step 29 is a tapered chamfered driven shaft. The positioning sleeve 25 is fitted onto the tapered chamfered driven shaft. The top upper surface of the tapered chamfered driven shaft is attached with a rubber pad 6 and is flush with the semi-circular positioning plate 27. Another rubber pad is also attached to the bottom of the active optical shaft 16. The rubber pad 6 serves to increase friction and prevent the circular piezoelectric ceramic 7 from being bumped or knocked.

[0019] The chamfering grinding block is a known and commonly used material in the art, including oilstones and sandpaper. The chamfering grinding block can be mounted on a robotic arm, and the chamfering grinding block can be matched with the circular piezoelectric ceramic 7 for chamfering by automatically controlling the movement of the robotic arm; or the chamfering grinding block can be handheld for chamfering.

[0020] The bearing placement block 3 is positioned by a circular locating pin 2 and fixed to the base 1 by bolts.

[0021] The linear guide rail 8 is fixed on the base 1. The slider 9 and the limiting block 10 are installed together on the linear guide rail 8. The limiting block 10 is provided with a handle. Moving the handle and fixing the limiting block 10 on the linear guide rail 8 will position and fix the slider 9.

[0022] The rear end of the screw 24 is provided with an adjustment knob 15. Rotating the adjustment knob 15 causes the screw 24 to rotate, adjusting the position of the slider 9, and thus adjusting the position of the polyurethane bearing 13.

[0023] The outer diameter of the polyurethane bearing 13 is smaller than the outer diameter of the circular piezoelectric ceramic 7.

[0024] In this embodiment, the bearing placement block 3 is positioned by a circular locating pin 2 and fixed to the base 1 by bolts. The bearing 4 is placed in the fixing hole of the bearing placement block 3, and then the chamfered driven shaft 5 is placed into the inner hole of the bearing 4. The top of the chamfered driven shaft 5 is provided with an annular step 29, and the center of the annular step 29 is the tapered chamfered driven shaft. The locating sleeve 25 is fitted onto the tapered chamfered driven shaft. After the top of the tapered chamfered driven shaft is attached with a rubber pad 6, it is flush with the surface of the semi-circular locating disk 27 and the upper surface of the perforated cylinder 26. Another rubber pad is also attached to the bottom of the active optical shaft 16. The rubber pad 6 serves to increase friction and prevent the circular piezoelectric ceramic 7 from being bumped.

[0025] The linear guide rail 8 is fixed to the base 1. The slider 9 and the limiting block 10 are mounted on the linear guide rail 8 and connected to the slider connecting block 11. The polyurethane bearing placement block 12 is fixed to the left side of the slider connecting block 11, and two polyurethane bearings 13 are installed on the top left side of the slider connecting block 11. The screw fixing component 14 is installed on the right side of the base 1, and the adjusting knob 15 is installed on the screw fixing component 14. Finally, it is placed on the worktable 19 of the bench drill for fixation. The bench drill is a common industrial bench drill.

[0026] The bench drill includes an active optical axis 16, a feed rotary handle 17, a high-precision drill chuck 18, a worktable 19, a base worktable 20, a housing 21, a motor 22, and a thickened column 23.

[0027] In use, first place a circular piezoelectric ceramic 7 on the rubber pad 6, and use the positioning sleeve 25 to keep the circular piezoelectric ceramic 7 concentric. Turn the adjustment knob 15 to make the two polyurethane bearings 13 contact the circular piezoelectric ceramic 7, and then lock the limit block 10. After removing the circular piezoelectric ceramic 7 and the positioning sleeve 25, place another circular piezoelectric ceramic 7 on the rubber pad 6. Pull the feed rotation handle 17 of the bench drill to make the active optical shaft 16 contact the circular piezoelectric ceramic 7, and drive the circular piezoelectric ceramic 7 to rotate. Then, use a chamfering grinding block (oilstone, sandpaper) to chamfer it.

[0028] The outer diameter of the rubber pad 6 is equal to the outer diameter of the thinned chamfered driven shaft. If the size of the replaced circular piezoelectric ceramic 7 differs significantly from the original size, a different size chamfered driven shaft can be used to adapt the outer diameter of the thinned chamfered driven shaft to the outer diameter of the new circular piezoelectric ceramic 7.

Claims

1. A circular arc-shaped piezoelectric ceramic positioning chamfering device, characterized in that: The system includes a bench drill, a chamfering grinding block, and a positioning fixture. The positioning fixture is installed on the worktable (19) of the bench drill and matches the active optical axis (16) of the bench drill. The chamfering grinding block matches the outer edge of the circular piezoelectric ceramic (7) for chamfering. The positioning fixture includes a base (1), which is fixed on the worktable (19). The base (1) is provided with a linear guide (8). One end of the linear guide (8) is provided with a bearing placement block (3), and the other end of the linear guide (8) is provided with a screw fixing member (14). The bearing placement block (3) is connected to the vertically arranged chamfering driven bearing (4) by a horizontally arranged bearing (4). The shaft (5) is connected, and a positioning sleeve (25) is provided on the top of the chamfered driven shaft (5). The positioning sleeve (25) is composed of a bottom perforated cylinder (26) and an upper semi-circular positioning disk (27). The perforated cylinder (26) is fitted onto the top of the chamfered driven shaft (5) through its through hole. A rubber pad (6) is provided on the top surface of the chamfered driven shaft (5). A protrusion (28) is provided on the circumference of the semi-circular positioning disk (27). The distance from the center of the semi-circular positioning disk (27) to the protrusion (28) is equal to the radius of the circular piezoelectric ceramic (7). The circular piezoelectric ceramic (7) is placed on the rubber pad (6). The circumference of the semi-circular positioning disk (27) is... The protrusion on the upper part centers the circular piezoelectric ceramic (7); the circular piezoelectric ceramic (7) matches the upper active optical axis (16), and the active optical axis (16), positioning sleeve (25), circular piezoelectric ceramic (7) and chamfered driven shaft (5) are located on the same axis; a slider (9) is slidably set on the linear guide rail (8), and a slider connecting block (11) is provided on the slider (9). A vertically arranged polyurethane bearing placement block (12) is provided at the front end of the slider connecting block (11). The polyurethane bearing placement block (12) is close to the chamfered driven shaft (5), and two polyurethane bearings are provided on the top of the polyurethane bearing placement block (12). (13); The semi-circular positioning disk (27) of the positioning sleeve (25) is located on the side away from the polyurethane bearing (13). Two polyurethane bearings (13) are arranged tangentially to the circular piezoelectric ceramic (7) on the rubber pad (6) from the opposite side of the semi-circular positioning disk (27) to fix the circular piezoelectric ceramic (7) after positioning. One side of the circular piezoelectric ceramic (7) is positioned by the semi-circular positioning disk (27), and the other side is fixed by the two polyurethane bearings (13). The rear end of the slider connecting block (11) is provided with a screw (24). The screw (24) and the screw fixing part (14) cooperate to form a screw structure.

2. The arc-shaped piezoelectric ceramic positioning chamfering device according to claim 1, characterized in that: The top of the chamfered driven shaft (5) is provided with an annular step (29), the center of which is a thinner chamfered driven shaft. The positioning sleeve (25) is fitted onto the thinner chamfered driven shaft. After the top surface of the thinner chamfered driven shaft is pasted with a rubber pad (6), it is flush with the semi-circular positioning plate (27). Another rubber pad is also pasted on the bottom of the active optical shaft (16).

3. The arc-shaped piezoelectric ceramic positioning chamfering device according to claim 1 or 2, characterized in that: The bearing placement block (3) is positioned by a circular locating pin (2) and fixed to the base (1) by bolts.

4. The arc-shaped piezoelectric ceramic positioning chamfering device according to claim 3, characterized in that: The linear guide rail (8) is fixed on the base (1). The slider (9) and the limiting block (10) are installed together on the linear guide rail (8). The limiting block (10) is provided with a handle. The slider (9) is positioned and fixed by moving the handle and fixing the limiting block (10) on the linear guide rail (8).

5. The arc-shaped piezoelectric ceramic positioning chamfering device according to claim 4, characterized in that: The screw (24) is provided with an adjustment knob (15) at its rear end.

6. A circular arc-shaped piezoelectric ceramic positioning chamfering device according to claim 1 or 2, characterized in that: The outer diameter of the polyurethane bearing (13) is smaller than the outer diameter of the circular piezoelectric ceramic (7).

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